Ninu ile-iṣẹ sẹsẹ irin, awọn yipo ti a lo ninu yiyi tutu ati awọn laini yiyi gbona jẹ awọn paati mojuto pataki. Nitori awọn ilana oriṣiriṣi ati awọn agbegbe lilo ti awọn mejeeji, awọn iyatọ nla tun wa ninu yiyan ohun elo ti awọn yipo. A yoo ṣawari ni apejuwe awọn iyatọ ninu yiyan ohun elo laarin awọn yipo ti a lo ninu yiyi tutu ati awọn laini yiyi gbona.
Ni akọkọ, iyatọ nla wa ninu iwọn otutu ti n ṣiṣẹ laarin awọn yipo laini yiyi tutu ati awọn yipo laini sẹsẹ gbona. Awọn laini yiyi gbigbona ni a ṣe ni awọn iwọn otutu giga ati igbagbogbo nilo lati koju awọn iwọn otutu ti o ga bi 1200 ℃. Nitorinaa, ohun elo yipo ti laini yiyi gbona gbọdọ ni iṣẹ iwọn otutu ti o dara julọ ati resistance rirẹ gbona. Awọn ohun elo ti o wọpọ pẹlu irin simẹnti chromium giga, irin iyara to gaju, ati irin ti ko gbona. Awọn ohun elo wọnyi kii ṣe itọju agbara ati lile nikan ni awọn iwọn otutu giga, ṣugbọn tun koju ifoyina ati ipata gbigbona, nitorinaa fa igbesi aye iṣẹ ti awọn yipo pọ si.
Ni ilodi si, awọn laini yiyi tutu ni a gbe jade ni tabi sunmọ iwọn otutu yara, nitorinaa awọn yipo ko nilo lati koju awọn iwọn otutu giga. Sibẹsibẹ, lakoko ilana yiyi tutu, nitori awọn ibeere giga fun didara dada ti irin dì, líle dada ati resistance resistance ti awọn yipo jẹ pataki pataki. Awọn yipo laini ti o tutu ni a maa n ṣe awọn ohun elo gẹgẹbi ohun elo irin alloy, irin irinṣẹ erogba, tabi irin palara chrome. Awọn ohun elo wọnyi ni lile lile ati ki o wọ resistance, eyi ti o le rii daju pe awọn dada ti awọn yipo ko ni rọọrun wọ lakoko lilo agbara-giga gigun, nitorina ni idaniloju didara ọja naa.
Ni ẹẹkeji, fifuye ati titẹ ti awọn iyipo lori yiyi tutu ati awọn ila yiyi gbona tun yatọ. Laini yiyi ti o gbona nilo lati compress awọn iwe irinna iwọn otutu ti o ga julọ sinu ọpọlọpọ awọn pato ti awọn awo irin, ati awọn yipo nilo lati koju titẹ nla ati ipa, nitorinaa ohun elo naa nilo lati ni agbara giga ati lile to dara. Laini yiyi tutu, nitori gbigbe ni awọn iwọn otutu kekere, nipataki jẹri rirẹ-giga giga ati awọn ipa ija lori awọn yipo. Nitorinaa, yiyan ohun elo ti awọn yipo yiyi tutu dojukọ diẹ sii lori resistance yiya wọn ati resistance arẹwẹsi.
Ni afikun, ilana iṣelọpọ ti awọn yipo laini sẹsẹ tutu nigbagbogbo pẹlu awọn ilana itọju dada diẹ sii, gẹgẹ bi chrome plating, quenching, bbl, lati mu ilọsiwaju líle oju wọn siwaju ati wọ resistance. Sibẹsibẹ, nitori ṣiṣẹ ni awọn agbegbe iwọn otutu ti o ga, awọn ọna itọju dada wọnyi ko dara fun awọn yipo laini yiyi gbona. Dipo, iṣẹ wọn jẹ imudara nipasẹ ohun elo alloy ati ilana itọju ooru ti ohun elo funrararẹ.
In summary, there are significant differences in the material selection of rolls for cold rolling and hot rolling lines, mainly reflected in the different requirements for working temperature, load, pressure, and surface quality. Hot rolling line roll materials need to have excellent high-temperature performance and thermal fatigue resistance, while cold rolling line roll materials emphasize high hardness and high wear resistance. Understanding and correctly selecting suitable roll materials is of great significance for ensuring the stability of the rolling process and product quality. As always, we sincerely appreciate your support and business. Please do not hesitate to contact ssophie@welongchina.com if you have any questions or concerns. We look forward to continuing our partnership with you.
Akoko ifiweranṣẹ: Jul-01-2024
